I have tried to do something like this with my forum. But the forum got split up. I gave people that donated a special title and the rest of the members were pissed! They were mad because they think that just because others helped me out that they got something that they didn't! I kind of understood it and I kind of didn't.
My forum is pretty big, but I don't know if I could support this. I think this is a really good idea and I probably will try it out, but it has taken me awhile to get my site as big as it is and keep the forums from going chaotic.
What would you guys do. I know you don't know my entire situation, but hey just throe your opinion at me!